What happens if my Fitbit smart watch is lost or stolen?
If your Fitbit smart watch is lost or stolen, you can remove or suspend your card from Fitbit Pay in two ways.
Via the Fitbit Wallet section of the Fitbit app
You can remove or suspend the card added to the smart watch using the Wallet section of the Fitbit app. You can still make payments using your physical card. No-one else can use your smart watch to make a payment without first entering your Fitbit 4-digit PIN code.
Via the Fitbit Website
If you have also lost your mobile phone, you can log into your fitbit.com dashboard on a computer to delete any cards added to Fitbit Pay.